RS485 Modbus RTU digital input modules for dry contact switch signals and equipment status acquisition.
Tax-inclusive reference prices in CNY. Negotiable; the quotation reflects the selected configuration, quantity and delivery requirements. All products carry a 3-year warranty.
For a complete system, include the power supply, sensors, communication access and platform deployment in your enquiry.
RS485 Modbus RTU digital input modules for dry contact switch signals and equipment status acquisition.
The page is written for engineering companies, system integrators, device manufacturers and B2B project procurement teams.
Input modules collect contacts and equipment states; they do not drive loads. Select by input count and cabinet layout, and add an output controller when equipment switching is required.
Select by channels and operating modes when Ethernet control and input status are required together. Compare dedicated input modules for many contacts and Q-series controllers for other output scales.
View product detailsSelect a Q-series configuration by circuit count, load type and site network. Compare 4G models for cellular access and the high-power range for higher-load circuit control.
View product details| Product type | Digital input module |
|---|---|
| Channel options | 16 or 32 channels |
| Input type | Dry-contact / switch-state acquisition |
| Communication interface | RS485 |
| Protocol | Modbus RTU |
| Supply | DC12V/24V or DC24V, depending on model |
| Mounting | 35mm DIN rail |
Digital input modules collect dry contacts such as limits, faults and manual/automatic states. A 32-channel ZMRI3200DI suits dense cabinet points; a 16-channel configuration suits smaller groups. Record the equipment name, contact meaning and normal state of every input before exposing the data through RS485 to a PLC, HMI or gateway.
The input module reads field states; it does not switch the load. In a combined system, relays issue start/stop actions and inputs read auxiliary contacts, protection events or equipment feedback. This can add lighting cabinet feedback, livestock equipment states or industrial limits and faults to a clearer remote operating view.
Addressed RS485 Modbus RTU reads each module’s channels. Allocate modules by zone and cabinet and align channels with terminals, equipment names and alarm meanings. Check each point against the supervisory display during commissioning. Select channel count, input type and supply by model, with spare capacity for later expansion.
No. A relay controller or suitable actuator circuit switches the fan; the input module reads its running or fault feedback.
Use contact count, cabinet zones, spare points and wiring space, and check the chosen model’s supply and input definition.
Acquire contacts or buttons and let control logic operate a separate status light, keeping acquisition distinct from output execution.
Call us or leave your contact details for product selection and project enquiries.
Call us+86 16605298829Taobao Store ↗Open the Zhenming IoT platform, product documentation or official Taobao store.